Available for work
Software Engineer · Backend & Systems
I build APIs, services and automation tools, from the first line of code to production. What I care about is code that lasts: easy to maintain, fast, and steady in production.
At a glance
I got into programming for the money. Unfortunately, I ended up enjoying it.
And it shows in my work. When a bug won’t go away, I track down its cause instead of working around it. When I’m handed a project, I own it end to end, from the database to the interface. And when the field is new to me, I get up to speed fast: that’s the part I enjoy most.
Over the last few years, that has meant a web application built from scratch for a client, a computer-vision model improved at Sogeti, an award-winning blockchain platform at Paris Blockchain Week and a Game Boy emulator in Rust.
Next project on the list: maybe yours.
A Game Boy and Game Boy Color emulator in Rust, built as a team: cycle-accurate CPU and graphics, sound, cartridge support, save states and a built-in debugger. Started as a school project, we kept going to make it truly faithful and enjoyable to use.
A cycle-accurate Game Boy and Game Boy Color emulator in Rust, with a debugger.
Sogeti (Capgemini)
From research papers, I implemented the most promising data augmentation techniques (cross-domain color transfer, sun glitter, box-aware CutMix) so a detector trained underwater could spot marine animals in aerial photos. A Bash pipeline tests each one on a GPU server: train a Faster R-CNN, score recall, resume after any crash.
Teaching an AI trained on underwater photos to spot marine animals from the sky.
A self-hosted media server at home: 16 Docker Compose services for streaming, library automation and HTTPS through a reverse proxy. The download client can only reach the internet through a WireGuard VPN, which acts as a kill switch, and a small script keeps its port in sync with the VPN. Video transcoding runs on the GPU.
A self-hosted media server: 16 Docker services, VPN-only downloads and GPU transcoding.
Digitalizes and authenticates maritime bills of lading, built as a team over three hackathons. A React app creates the eBL, then a Java API hashes it and mints an NFT carrying that hash on the XRP Ledger, so anyone can check it was never altered. The first version used Tezos smart contracts.
Maritime bills of lading as electronic documents, proven on the XRP Ledger or Tezos.
A small autonomous AI agent written from scratch in Python on top of a local Ollama model: raw API calls, tool schemas generated from docstrings, and a ReAct loop that chains web search, scraping, file reading and more.
An AI agent written from scratch on a local Ollama model.
Sorts live firewall logs into attacks and bugs, built as a team during a cyberdefence hackathon. A FastAPI backend runs a LangGraph workflow where rules and a LightGBM model classify each log and an LLM explains unknown events. A React dashboard shows stats, fix suggestions and an AI assistant, and critical alerts trigger a phone call.
Live firewall log triage, with ML classification and LLM explanations.
AI · 2025
Live firewall log triage, with ML classification and LLM explanations.
Hackathon
Web · 2026
An online multiplayer Tetris in the browser, synced in real time.
School
Web · 2024
Online multiplayer Pong with tournaments, 3D rendering and an AI opponent.
School
Low-level · 2024
An IRC server in C++98 that real clients like irssi or HexChat can connect to.
School
Low-level · 2023
Our own version of Bash in C, the program that runs the commands typed in a terminal.
School
Blockchain · 2025
Launch your own ERC-20 token on Bahamut and open its liquidity pool in a few clicks.
Hackathon
Games · 2024
A first-person 3D maze in C, drawn with raycasting like Wolfenstein 3D or Doom.
School
AI · 2025
Leaf disease detection with a convolutional neural network.
School
Mobile · 2026
A native Android contacts and SMS app in Kotlin, with no third-party libraries.
School
Blockchain · 2024
An Ethereum token for School 42's wallet, where every reward needs several staff approvals.
School
AI · 2025
A hand-coded one-vs-all logistic regression, Hogwarts sorting hat style.
School
Games · 2024
A 72-hour jam game: outrun a crowd until your taxi arrives.
Hackathon
Low-level · 2023
The dining philosophers problem in C, with threads and mutexes.
School
Web · 2026
This site: AI-assisted, spec-driven, every milestone reviewed through pull requests.
Personal
Mobile · 2026
An Android app in Kotlin to browse any 42 student profile through the school API.
School
AI · 2025
A from-scratch linear regression that predicts a car’s price.
School
Blockchain · 2024
A one-of-a-kind NFT on Ethereum, minted from a small web page with MetaMask.
School
Low-level · 2024
C library functions in x86-64 assembly, up to base conversion and list sorting.
School
Games · 2023
A top-down 2D game in C with the MiniLibX, styled like Pokémon Mystery Dungeon.
School
My core: backend, systems and tooling.
APIs, authentication and services.
Data modelling and queries, relational or not.
Code close to the machine: memory, processes, performance.
Containers, deployment, continuous integration and API testing.
Vision models, training and LLM agents.
Smart contracts, tokens and data anchored on-chain.
Web interfaces when a project calls for them.
Native Android apps.
Game engines and 3D, native or in the browser.
→
Internship · 6 months
Sogeti, part of Capgemini
A very good collaborator, serious and committed. He has a solid grasp of Machine Learning and proposes relevant solutions while staying pragmatic. He is also reliable, pleasant to work with and always ready to share his knowledge.
→
Internship · 6 months
Y247 Group
He took a full part in developing our platform, on both front-end and back-end. He proved serious, autonomous and committed, quick to grasp technical problems and propose suitable solutions. […] I recommend him without hesitation for Full Stack development work.
→
Expert in computer architecture
CS50’s Introduction to Computer Science
CND Vigie ·
3rd placeParis Blockchain Week Bahapad ·
3rd placeH-W3B Super Finale KAYP ·
2nd placeParis Blockchain Week KAYP ·
WinnerH-W3B Paris KAYP ·
WinnerOpen to opportunities. Email is the fastest way to reach me.
By email
jocelynrenaultpro@Working through Malt?
My profile, recommendations and mission requests are on Malt too.
Profile, recommendations and mission requests.
See my Malt profile (opens in a new tab)
